Time control switch



Sept. 9 1924. 11,508,064

L. W. RADMAN rma CONTROL SWITCH Filed Feb. 21, 1923 Q 2 Sheets-Sheet l &

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Patented Sept. 9, 1924'.

thereof residing umrso STATES] PA ENT OFFICE.

LESTER W. DEAN, OI BUCKHANNO N, WEST VIRGINIA.

TIME CONTROL SWITCH.

Application filed February 21, 1928. Serial No. 620,828.

To allwkom it may concern:

Be it-known that I, Lnsrnn W. RADMAN, a' citizen of the United States,residing at Buckhannon, in the county of Upshur and State of WestVirginia, have invented certain new and useful Improvements in TimeControl Switches, of which the following is a specification. Myinvention relates to improvements in time controlled switches, theprimary object in the provision of such a switch that may be readilyassociated with practically all types of alarm clocks, with which I amnow familiar, the invention being further characterized by itssimplicity of construction and ease of application to and removal fromthe said alarm clocks, the

device constituting relatively few parts, and these correlated in suchmanner as to reduce the liability of derangement to a minimum. A furtherobject of my invention is the provision of such a time controlled switchthat is primarily, but not specifically, adapted to be employed inconjunction with the lighting systems for the show windows of departmentstores and the like, the switch belng well adapted to cut out theselights at a predetermined time.

With the above and other objects in view, the-nature and advantages of mdevice will be readily understood by a care il review of thespecification when considered in conjunction with the drawings.

In the drawings forming part of this application, like numerals ofreference indicate similar parts in the several views, and where1n:

Figure 1 is a cross sectional view of my switch casing, the same beingshown as applied to a" conventional type of alarm clock, the switchmechanism being shown in side elevation.

, Itigure 2 is a rear elevational view of this casing disposed upon theclock. I V

Figure 3 is a cross sectional view of my improved switch.

' F1 e 4 is a rear elevational view of the switc per so. I Figure 5 is across sectional view taken sulstantially upon the line 5-5 of Figure 3,an Y Figure 6' is a perspective of one'of the elements constituting myimproved switch.

Referring to thedrawin in detail, A deslgnates an alarm clock of t eusual construction, and B the casing for my switch mechanism,

as shown and having in the front wall/thereof, an opening 6 for thereception of the usual reduced portion a of said alarm clock, thisopening I) being formed at its inner side with a flange ,c. r

The reference character 5 indicates the alarm spring winding shaft ofthe clock, one end of this shaft being reduced and screw which ispreferably of square shape threaded as at 16 for the reception of theusual finger winding member 7. In applying my switch to the type ofalarm clock shown, the said finger winding member 7 is removed from thewinding shaft of the clock, at'which time, my switch casing B may bepositioned thereon in a' manner more clearly indicated in Figure 1'.

Within this casing is a square shaft 8, I

the front end of which is formed with a screw threaded socket forreceiving the said reduced and screw threaded end 6 of the clock springshaft 5. Adjacent the front end of this shaft 8 is a porcelaininsulating member 9, preferably round in shape, and

having an opening 10 therethrough, which opening is centrally of theinsulatin block 9 and is also round-shaped to permit t c said shaft 8 torotate therein. The front face of this block 9 has close contact withthe adj acent wall of the clock A, the opposite face of theblockcarrying a pair of diametrically disposed stationary contact arms11, to which are' secured the wires 12 of a lighting circuit.

Also upon the front face of the insulating block 9, and between thestationary contact arms 11 is a metallic disk 13, the same being alsoprovided with a central opening, which is round shaped for permittingthe said shaft 8 to rotate therein, this disk 13 being formed withlateral extensions 14 formed with openings therein, for-the reception ofset screws 15, whereby this disk may be rigidl secured to the block 9and the casing A.

he disk 13 is further formed at diametrically opposite sides of theshaft 8 with a pair of arcuate slots 16 and carried by the shaft 8 androtatin therewith and in face to face contact with the disk 13 is arelatively smaller disk 17 the same being formed with a pair oflaterally extending fingers 18 which are bent forwardly as at 19 andadapted for engagement within the said slots 16 of the first mentioneddisk 13. Carried by the shaft 8 and insulated therefrom as at 20, inFigure 3, is a still further disk- 21, the same being directly forwardlyof the disk 17 and formed with contact arms 22, which arms are in directalinement with the ends of the said stationary contact member 11 carriedby the said insulating block a.

Adjacent the outer end of the square shaft 8, the same is grooved as at23 for the reception of'a removable metallic plate 2i and between thisplate 24 and the disk 21 carrying the contact arms 22 is a coiled spring25 which tends to maintain the several disks in close contact with eachother as well as maintaining the insulating block 9 in face to facecontact with the adjacent wall of the casing of the clock A.

The extreme end of this shaft 8 projects through an opening in theswitch casing B, and is reduced and screw threaded as at 26 {gr 'ecivingthe said finger winding mem- The remaining control shafts of the alarmclock are also extended through the back 'wall of the'switch casing B inany manner desirable, but preferably through the instrus mentality of ashaft extension similar to the shaft 8, shown in several of the figures,and in the operation of my device, the alarm is set for a predeterminedtime, it being of course understood that previous to the'application ofmy switch to an alarm clock the alarm spring is first wound to a certaindegree, and after the switch has been applied to the clock, the key orfin e r member 7 may be rotated for engaging t "e movable contacts 22with the stationary contacts 11, at which time, the circuit will becompleted through the wires 12. As soon as the alarm of the clockisunwound,'the shaft 5 will rotate in a reverse direction for consequentlydisenga ing the movable contacts 22 from the stationary contacts 11 forthereby breakin the circuit to the wires 12.

in view of the above description when considered in conjunction with thedrawings, it is believed by me that it-will be readil appreciated' bythose skilled in the art, t at I have provided a highly improved form oftime controlled switch which is well adapted for application topractically all types of alarm clocks, and even though I have hereinshown and described the preferred embodiment of the present invention,it is nevertheless to be understood that minor changes may be madetherein, without departing from the spirit and scope of the invention Ias claimed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent is:

1. A time control switch for attachment vto an alarm clock including acasin formed for receiving a gortion of said cloc a base member removaly mounted on the rear wall of the clock having an opening therein inline with the alarm spring winding shaft, a shaft sectionextendingthrough the opening in the base member and removably connected with thespring winding shaft at one end and projecting through an opening in thecasing at the other end for removably receiving a winding handle, a airof con tacts mounted on said base mem er at opposite sides of that saidshaft section, a cam disc mounted on the base member having an openingreceiving said shaft. section, a cam member mounted for rotation withsaid shaft section and for'cooperation with the cam of said cam disc, acontact member mounted for rotation with the shaft section havingcontact arms for engagement with the contacts on said base member forclosing the circuit between said contacts, and resilient means mountedon the shaft section and engaging the contact member for noralarmmechanism, a shaft extension of square cross section removably securedat one end to the alarm winding shaft and projecting outwardly throughan opening in the casing at the other end for removably receiving thewinding handle, said shaft extending through the opening in said basemember, a

cam disc removably mounted on said base member having an opening in thecentral portion thereof receiving the extension shaft, a cam memberslidably mounted on said extension shaft and rotatable therewith forcooperation with the cam disc for limiting the rotative movement of theshaft extension in one direction, a contact member hav ing a slidableinsulated connection with said extension shaft for rotation therewithand provided with contEct arms extending from diametrically oppositesides thereof, avpair of contacts mounted on the base member forcooperation with the contact arm, a disc member mounted adjacent theouter end of said extension shaft, and a coil spring interposed betweensaid disc member and con tact member for normally forcing ,said contactmember and cam disc toward the base member,- whereby the contact armsare held

